Hives are itchy. The itch can be intense or mild, long-lasting or of short duration. Often, the bumps caused by hives will be preceded by itching skin. Other times, the bumps and itching will occur simultaneously. Hives usually occur in clusters, which can erupt anywhere on the body.
Hives may be as tiny as pin dots or much, much larger. Their size and shape can also change. In some instances, hives may morph together, causing very large, itchy areas of skin. The skin surrounding the area where hives occur may look red, swollen, or irritated. Hives can occur when too much histamine is released into the body by the immune system. This often is caused by an allergic reaction. Allergies are thought to be the major cause of hives.
Skin rashes can be scaly, red, and raw-looking. They may be dotted with blisters, plaques, or welts. They may also hurt, itch, or make skin feel warm to the touch. Sometimes, the areas of affected skin may also become swollen. Rashes have a wide range of potential causes, including allergic reactions. The causes of rashes include:. Hives often disappear on their own. If you can avoid exposure to the allergen causing the reaction, your hives will hopefully disappear and not return.
If you continue to have hives, there are several at-home treatments you can try to get rid of them. These include:. Chronic, long-lasting hives may need more aggressive, medical treatment, such as prescription antihistamines, oral corticosteroids, or biologic drugs.
Severe cases of hives may require an epinephrine injection. Rashes can be acute or chronic. This virus lays dormant in any person who has had chicken pox. If you have had chicken pox then you can develop shingles at any time. The reason that this virus can reactivate itself is not known but it thought to be caused by lower immune system functions as a person ages. Spread A person with shingles can pass the virus on to any person who is not immune to chicken pox.
The difference is if a person comes in contact with someone with shingles and has not had chicken pox, then they will get the chicken pox and not shingles.
Treatment No cure for shingles is available just yet, but certain prescription medication can help the healing process and shorten the amount of time the virus will last. These antiviral drugs are often prescribed, Zovirax, Famvir, or Valtrex. Some topical creams may also be used to help with the pain and itchiness that shingles causes. What Are They? Hives, also medically known as uritcaria, is a skin reaction to a number of things that causes itchy and swollen patches on the skin.
Hives is relatively common and will affect one out of twenty people at some point in their life. Symptoms The most common symptoms of hives are raised red welts on the skin, swelling of the skin around the welts, severe itching, spots that turn white when pressed.
The welts that develop from hives can occur alone of in a group. Hives can pop up on any part of the body but most commonly on the arms, chest, or back.
Cause Hives can be caused by just about anything. It is a mild allergic reactions in some cases. Red, itchy rash? Get the skinny on dermatitis. NIH News in Health. April Bennett JE, et al. Dermatophytosis ringworm and other superficial mycoses. Accessed June 29, Pityriasis rosea. Cutaneous reactions to drugs. Lichen planus. American Academy of Dermatology. Accessed July 29, Varicella and herpes zoster.
Parasites: Cercarial dermatitis also known as swimmer's itch. Irritant contact dermatitis. Allergic contact dermatitis. Kliegman RM, et al. Disorders of the sweat glands. In: Nelson Textbook of Pediatrics. Kalra MG, et al. Intertrigo and secondary skin infections. American Family Physician. Mayo Clinic Press Check out these best-sellers and special offers on books and newsletters from Mayo Clinic.
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